One of the two authors of the post (Robert Krulwich) is also a co-host on a fantastic podcast called Radiolab. Their most recent episode is about this topic and they tell the story of a Japanese man that was in the blast radius at Hiroshima, went home to Nagasaki, injured, and was caught in the second explosion as well!

http://www.radiolab.org/blogs/radiolab-blog/2012/jul/16/doub...